#!/bin/sh

set -e

# This script builds an image that contains assets, that's then used by:
# - The `CNG` downstream pipelines (triggered from `gitlab-org/gitlab` via the `review-build-cng` job):
#   https://gitlab.com/gitlab-org/gitlab/-/blob/c34e0834b01cd45c1f69a01b5e38dd6bc505f903/.gitlab/ci/review-apps/main.gitlab-ci.yml#L69.
# - The `omnibus-gitlab` downstream pipelines (triggered from `gitlab-org/gitlab` via the `e2e:package-and-test` job):
#   https://gitlab.com/gitlab-org/omnibus-gitlab/-/blob/dfd1ad475868fc84e91ab7b5706aa03e46dc3a86/.gitlab-ci.yml#L130.
# - The `gitlab-org/charts/gitlab` `master` pipelines via `gitlab-org/build/CNG`,
#   which pull `registry.gitlab.com/gitlab-org/gitlab/gitlab-assets-ee:master`
# - The `omnibus-gitlab` and CNG `master`/stable-branch pipelines, for both gitlab.com and dev.gitlab.org,
#   which pull `registry.gitlab.com/gitlab-org/gitlab/gitlab-assets-ee:${CI_COMMIT_REF_SLUG}`.
# - The `omnibus-gitlab` tag pipelines, for both gitlab.com and dev.gitlab.org,
#   which pull `registry.gitlab.com/gitlab-org/gitlab/gitlab-assets-ee:${CI_COMMIT_REF_SLUG}`.
# - The CNG tag pipelines, for both gitlab.com and dev.gitlab.org,
#   which pull `registry.gitlab.com/gitlab-org/gitlab/gitlab-assets-ee:${CI_COMMIT_REF_NAME}`.
# - The auto-deploy pipelines, which pull `registry.gitlab.com/gitlab-org/gitlab/gitlab-assets-ee:${CI_COMMIT_SHA}`.

. scripts/utils.sh

# Exit early if we don't want to build the image
if [ "${BUILD_ASSETS_IMAGE}" != "true" ]
then
  exit 0
fi

# Generate the image name based on the project this is being run in
ASSETS_IMAGE_NAME="gitlab-assets-ce"

# `dev.gitlab-org` still has gitlab-ee.
if ([ "${CI_PROJECT_NAME}" = "gitlab" ] && [ "${FOSS_ONLY}" != "1" ]) || ([ "${CI_PROJECT_NAME}" = "gitlab-ee" ] && [ "${FOSS_ONLY}" != "1" ]); then
  ASSETS_IMAGE_NAME="gitlab-assets-ee"
fi

# Generate this image for https://jihulab.com/gitlab-cn/gitlab
if [ "${CI_PROJECT_NAMESPACE}" = "gitlab-cn" ]; then
  ASSETS_IMAGE_NAME="gitlab-assets-jh"
fi

ASSETS_IMAGE_PATH="${CI_REGISTRY}/${CI_PROJECT_PATH}/${ASSETS_IMAGE_NAME}"

# Used in MR pipelines
COMMIT_ASSETS_HASH_DESTINATION="${ASSETS_IMAGE_PATH}:$(assets_image_tag)"
# Used by other projects's master pipelines
COMMIT_REF_SLUG_DESTINATION="${ASSETS_IMAGE_PATH}:${CI_COMMIT_REF_SLUG}"
# Used by auto-deploy pipelines: https://gitlab.com/gitlab-org/release/docs/blob/master/general/deploy/auto-deploy.md
COMMIT_SHA_DESTINATION=${ASSETS_IMAGE_PATH}:${CI_COMMIT_SHA}
# Used for CNG tag pipelines
COMMIT_REF_NAME_DESTINATION="${ASSETS_IMAGE_PATH}:${CI_COMMIT_REF_NAME}"

if skopeo inspect "docker://${COMMIT_ASSETS_HASH_DESTINATION}" > /dev/null; then
  echosuccess "Image ${COMMIT_ASSETS_HASH_DESTINATION} already exists, no need to rebuild it."

  skopeo copy "docker://${COMMIT_ASSETS_HASH_DESTINATION}" "docker://${COMMIT_REF_SLUG_DESTINATION}"
  skopeo copy "docker://${COMMIT_ASSETS_HASH_DESTINATION}" "docker://${COMMIT_SHA_DESTINATION}"

  if [ -n "${CI_COMMIT_TAG}" ]; then
    skopeo copy "docker://${COMMIT_ASSETS_HASH_DESTINATION}" "docker://${COMMIT_REF_NAME_DESTINATION}"
  fi
else
  echoinfo "Image ${COMMIT_ASSETS_HASH_DESTINATION} doesn't exist, we'll need to build it."

  DESTINATIONS="--destination=${COMMIT_ASSETS_HASH_DESTINATION} --destination=${COMMIT_REF_SLUG_DESTINATION} --destination=${COMMIT_SHA_DESTINATION}"

  if [ -n "${CI_COMMIT_TAG}" ]; then
    DESTINATIONS="$DESTINATIONS --destination=${COMMIT_REF_NAME_DESTINATION}"
  fi

  mkdir -p assets_container.build/public
  cp -r public/assets assets_container.build/public/
  cp Dockerfile.assets assets_container.build/

  echo "Building assets image for destinations: ${DESTINATIONS}"

  /kaniko/executor \
    --context="assets_container.build" \
    --dockerfile="assets_container.build/Dockerfile.assets" \
    ${DESTINATIONS}
fi
